Notebook Battery Care

I'm getting so many different opinions on this it's really confusing... I just wanted to know how I should take care of my notebooks Lithium Ion battery? What are the good charging proceedures? Do I let it discharge completely before recharging? Or just charge it when I'm not using the thing? And other proceedures that should be followed to make it last as long as possible.

Also, should I leave the battery in the notebook when it's not in use and it's convienent for me to take it out (like when I'm at home sleeping or something?)

Thank you so much! =D I really appreciate your help on the questions I've had in the past and now.

Sorry, this post was rushed, btw. I've got some business in town to attend to.